CN114858693A - Asphalt concrete aging test device under multi-factor coupling effect - Google Patents
Asphalt concrete aging test device under multi-factor coupling effect Download PDFInfo
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- CN114858693A CN114858693A CN202210607713.9A CN202210607713A CN114858693A CN 114858693 A CN114858693 A CN 114858693A CN 202210607713 A CN202210607713 A CN 202210607713A CN 114858693 A CN114858693 A CN 114858693A
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Abstract
The invention discloses an asphalt concrete aging test device under the multi-factor coupling effect, and provides a test device which is simple in structure, flexible to disassemble, convenient to operate, fast and efficient and is used for an asphalt concrete durability test under an indoor simulated complex environment. The device comprises a refrigerating system, a test box, a spraying device and a control device. The device can realize the test of asphalt ageing under the multifactor coupling effect such as ultraviolet intensity, freeze thawing, humidity, oxygen and harmful substance erosion to can more truly and accurately simulate asphalt concrete ageing under the natural environment, provide basic equipment for the system and develop the multifactor durability research of asphalt concrete under the natural environment comprehensively.
Description
Technical Field
The invention relates to an asphalt concrete aging test device under the multi-factor coupling effect.
Background
In a natural environment, the aging of asphalt concrete is mainly influenced by oxygen, illumination, water and temperature, and a test device corresponding to an actual natural environment does not exist at present. The asphalt concrete aging test device that present indoor test used focuses on single factor test more, mainly has ultraviolet ray ageing appearance, oven, dry and wet cycle test case and freeze-thaw cycle test case etc. and the test device who is used for simulating multifactor coupling effect such as asphalt concrete at temperature, humidity and oxygen and ultraviolet radiation ageing still belongs to blank, so, the problem that the research and development asphalt concrete aging test device is urgent to be solved under a multifactor coupling effect.
Disclosure of Invention
Based on the technical problems, the invention provides an asphalt concrete aging test device under the multi-factor coupling effect, so as to fill the blank of the field and solve the problems in the background technology.
The invention provides an asphalt concrete aging test device under the multi-factor coupling effect, which comprises a refrigeration system, a test box, a spraying device and a control device, wherein the refrigeration system comprises a compressor, a capillary tube, a drying filter, a condenser, a first evaporator, a first connecting pipe, a second evaporator, a second connecting pipe, a supporting steel wire, an air return pipe and an air outlet pipe. The compressor is provided with a process pipe orifice, the compressor is connected to the condenser through an air outlet pipe, the condenser is connected with a dry filter, the dry filter is connected with a capillary pipe, the condenser, the dry filter and the capillary pipe are positioned in a heat dissipation box body at the rear side of the test box body, heat dissipation holes are uniformly distributed on an outer layer plate of the heat dissipation box body, the capillary pipe is connected to a first evaporator between an inner layer plate and an outer layer plate of the test box body, the first evaporator is fixed between the inner layer plate and the outer layer plate at the left side of the test box body through a support steel wire, the capillary pipe penetrates through the rear layer plate of the test box body through a first connecting pipe to be connected to a second evaporator, the second evaporator is fixed between the inner layer plate and the outer layer plate at the right side of the test box body through a support steel wire, the first evaporator and the second evaporator are connected with each other to form parallel connection and are connected to a second connecting pipe, the second connecting pipe is connected with a gas return pipe, and the gas return pipe is connected to the compressor.
The test box is divided into an upper box body, a heat dissipation box body and a lower box body, wherein the upper box body comprises an outer plate, a heat preservation and insulation layer, a heating plate and an inner plate, an air inlet/outlet is formed in the top of the upper box body, a control valve is arranged on the air inlet/outlet, the air inlet/outlet is connected with an air bottle through an air pipe, a temperature and humidity sensor, an air concentration sensor and a spray head (capable of spraying mist, water, acid, salt solution and the like) are arranged on the inner side of the top of the upper box body, an ultraviolet lamp tube is arranged in the upper box body, two layers of steel wire mesh discs are arranged in the upper box body, a door cover is arranged in front of the upper box body, a handle is arranged on the door cover, an water outlet/inlet is formed in the left side and the right side of the lower portion of the upper box body, and the water outlet/inlet is provided with the control valve; the lower part box constitute by outer plywood, outer plywood on have the louvre, the lower part box in have compressor and high-pressure little fog humidifier, lower part bottom of the case body install the gyro wheel, lower part box front portion have the control box, the heat dissipation box be located the rear side of whole experimental box, the heat dissipation box in have refrigerating system.
The spraying device comprises a high-pressure micro-mist humidifier, a water delivery pipe and a spray head, the high-pressure micro-mist humidifier is connected with the water delivery pipe and a third connecting pipe, the water delivery pipe is connected with the spray head of the upper box body, the third connecting pipe leads to the outer side of the lower box body and is connected with a water tank, and the water tank is provided with scales.
The control box in have visual controlling means, visual controlling means includes power control switch, visual humidity control panel, visual temperature control panel, visual atomizing control panel and visual gas concentration monitoring control panel and ultraviolet intensity control panel.
In the above technical solution, preferably, the ultraviolet lamp tube is made of a corrosion-resistant and insulating material.
In the above technical solution, preferably, the pipeline connecting the high-pressure micro-mist humidifier and the spray head is arranged between the inner and outer laminates.
In the above technical solution, preferably, the control box is a visual touch screen display.
In the above technical solution, preferably, the test chamber and the water tank have scale marks.
Compared with the existing test device, the invention has the beneficial effects that:
the invention provides an asphalt concrete aging test device under the multi-factor coupling effect, which can adjust the ultraviolet illumination intensity and the oxygen flux through a control panel, realize freeze-thaw cycle through a refrigeration system and a heating plate, adjust humidity and simulate rainfall through a fog spraying system.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is a schematic top view of the present invention;
in the figure 1. outer laminate; 2. a heat insulation layer; 3. a first evaporator; 4. heating plates; 5. an inner layer board; 6. a condenser; 7. drying the filter; 8. a capillary tube; 9. a second evaporator; 10. a heat dissipation box body; 11. a gas concentration sensor; 12. a spray head; 13. an inlet/outlet port; 14, a trachea; 15. a gas cylinder; 16. a temperature and humidity sensor; 17. heat dissipation holes; 18. a first connecting pipe; 19. an ultraviolet lamp tube; 20. a wire mesh disc; 21. a door cover; 22. a handle; 23. a second connecting pipe; 24. an inlet/outlet port; 25. an air outlet pipe; 26. an air return pipe; 27. a compressor; 28, a roller; 29. a control box; 30. a high-pressure micro-mist humidifier; 31. a water delivery pipe; 32. a water tank; 33. a third connecting pipe; 34. a process pipe orifice; 35. and supporting the steel wire.
Detailed Description
For better understanding and implementation, the present invention is further described below with reference to specific test cases and drawings, but the present invention is not limited to these embodiments, and any modifications or substitutions based on the embodiments are still within the scope of the present invention as claimed in the device claims.
The technical solution of the present invention is further explained with reference to the drawings and the embodiments.
The device is particularly applied to a laboratory and can simulate the asphalt concrete durability test environment under the multi-factor coupling effect, and is an asphalt concrete aging test device under the multi-factor coupling effect.
I. Referring to fig. 1, 2 and 3, the refrigeration system includes a compressor 27, a capillary tube 8, a dry filter 7, a condenser 6, a first evaporator 3, a first connection pipe 18, a second evaporator 9, a second connection pipe 23, a support wire 35, an air outlet pipe 25 and an air return pipe 26. The compressor 27 is provided with a process pipe opening 34, the compressor 27 is connected to the condenser 6 through an air outlet pipe 25, the condenser 6 is connected with a drying filter 7, the drying filter 7 is connected with a capillary pipe 8, the condenser 6, the drying filter 7 and the capillary pipe 8 are positioned in a heat dissipation box 10 at the rear side of the test box, heat dissipation holes 17 are uniformly distributed on an outer plate 1 of the heat dissipation box 10, the capillary pipe 8 is connected with a first evaporator 18 between the inner plate and the outer plate of the test box, the first evaporator 18 is fixed between the inner plate and the outer plate at the left side of the test box through a support steel wire 35, the capillary pipe 8 is connected to a second evaporator 9 through a first connecting pipe 18 passing through the rear plate layer of the test box, the second evaporator 9 is fixed between the inner plate and the outer plate at the right side of the test box through a support steel wire 35, the first evaporator 3 and the second evaporator 9 are connected with each other to form a parallel connection to a second connecting pipe 23, the second connecting pipe 23 is connected to a return pipe 26, and the return pipe 26 is connected to a compressor 27.
II, referring to fig. 1, 2 and 3, the test box is divided into an upper box body, a heat radiation box body 10 and a lower box body, the upper box body comprises an outer plate 1, a heat preservation and insulation layer 2, a heating plate 4 and an inner plate 5, the top of the upper box body is provided with an air inlet/outlet 13, the air inlet/outlet 13 is provided with a control valve, the gas inlet/outlet 13 is connected with a gas cylinder 15 through a gas pipe 14, the inner side of the top of the upper box body is provided with a temperature and humidity sensor 16, a gas concentration sensor 11 and a spray head 12, an ultraviolet lamp tube 19 is arranged in the upper box body, two layers of steel wire mesh discs 20 are arranged in the upper box body, a door cover 21 is arranged in front of the box body, the door cover 21 is provided with a handle 22, the left side and the right side of the lower part of the upper box body are provided with a water inlet/outlet 24, and the water inlet/outlet 24 is provided with a control valve; the lower part box constitute by outer plywood, outer plywood on have louvre 17, the lower part box in have compressor 27 and high-pressure little fog humidifier 30, lower part bottom of the body install gyro wheel 28, lower part box front portion have control box 29, heat dissipation box 10 be located the rear side of whole experimental box, heat dissipation box 10 in have refrigerating system.
And III, referring to fig. 1, 2 and 3, the spraying device comprises a high-pressure micro-mist humidifier 30, a water pipe 31 and a spray head 12, the high-pressure micro-mist humidifier is connected with the water pipe 31 and a third connecting pipe 33, the water pipe 31 is connected with the spray head 12 of the upper box body, and the third connecting pipe 33 leads to the outer side of the lower box body and is connected with a water tank 32.
And IV, referring to fig. 1, 2 and 3, a visible control device is arranged in the control box 29, and the control device comprises a power control switch, a visible humidity control panel, a visible temperature control panel, a visible atomization control panel, a visible gas concentration monitoring control panel and an ultraviolet intensity control panel.
Example (b): asphalt concrete salt freezing test under coupling effect of various environmental factors
Step 1: and determining the size of the test box according to the concrete size required by the test. The test is that the test piece manufactured by a wheel-rolling forming method (T0703- 2 SO 4 Compound salt solution), placing the required test pieces into a stainless steel tray, and placing a plurality of groups of test pieces on a steel wire mesh disc in a test box in a layered manner.
Step 2: and opening the valve, injecting the composite salt solution into the test chamber through the water inlet/outlet port to enable the composite salt solution to completely immerse the sample and be 20mm higher than the top of the sample, and closing the valve when the solution reaches a certain scale. Connecting gas cylinder (this time oxygen)Gas O 2 ) To the inlet/outlet port and check the valve and barometer.
And step 3: considering that most of salt freezing damage modes are salt solution ice crystals piercing damage, the temperature is set through a control panel, freezing is carried out for 16h at minus 25 ℃, and unfreezing is carried out for 8h at 40 ℃ to serve as a freezing-thawing cycle. After one freeze-thaw cycle is finished, the sample is set to be soaked in a constant-temperature (40 ℃) solution for 12 hours, and then the sample is dried for 12 hours at the temperature of 40 ℃, so that the freeze-thaw cycle is a dry-wet cycle, and the freeze-thaw-dry-wet cycle is 8 times in total.
And 4, step 4: the method comprises the steps of simultaneously carrying out gas erosion and ultraviolet radiation tests in the process of freeze thawing-dry-wet circulation, setting the temperature of the freeze thawing circulation and the ultraviolet irradiation intensity through a temperature control panel and an ultraviolet intensity control panel, opening an air inlet/outlet valve to introduce oxygen into a test box body, and adjusting errors at any time through data monitored by a gas concentration sensor and a temperature and humidity sensor to ensure the accuracy of test conditions.
And 5: and (4) after the specified age is reached, taking out the asphalt concrete test block, collecting test data, and repeating the steps 2, 3 and 4 until the final test is finished.
And 6: after the test is finished, the control switches are closed in sequence, the door cover is opened, the asphalt concrete test piece is taken out from the test box body, and the water outlet/inlet valve is opened to discharge the salt solution.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. The utility model provides an asphalt concrete aging test device under multifactor coupling effect which characterized in that: the device comprises a refrigerating system, a test box, a spraying device and a control device, wherein the refrigerating system comprises a compressor 27, a capillary tube 8, a dry filter 7, a condenser 6, a first evaporator 3, a first connecting pipe 18, a second evaporator 9, a second connecting pipe 23, a supporting steel wire 35, an air return pipe 26 and an air outlet pipe 25, a process pipe orifice 34 is arranged on the compressor 27, the compressor 27 is connected to the condenser 6 through the air outlet pipe 25, the condenser 6 is connected with the dry filter 7, the dry filter 7 is connected with the capillary tube 8, the condenser 6, the dry filter 7 and the capillary tube 8 are positioned in a heat dissipation box body 10 at the rear side of the test box body, heat dissipation holes 17 are uniformly distributed on an outer plate 1 of the heat dissipation box body 10, the capillary tube 8 is connected with the first evaporator 18 between an inner layer plate and an outer layer plate of the test box body, the first evaporator 18 is fixed between the inner layer plate and the outer layer plate at the left side of the test box by the supporting steel wire 35, the capillary tube 8 penetrates through the rear side plate layer of the test box body through a first connecting pipe 18 and is connected to a second evaporator 9, the second evaporator 9 is fixed between the inner layer plate and the outer layer plate on the right side of the test box body through a supporting steel wire 35, the first evaporator 3 and the second evaporator 9 are connected in parallel and are connected to a second connecting pipe 23, the second connecting pipe 23 is connected with a gas return pipe 26, and the gas return pipe 26 is connected to a compressor 27; the test box is divided into an upper box body, a heat radiation box body 10 and a lower box body, the upper box body comprises an outer plate 1, a heat preservation and insulation layer 2, a heating plate 4 and an inner plate 5, the top of the upper box body is provided with an air inlet/outlet 13, the air inlet/outlet 13 is provided with a control valve, the gas inlet/outlet 13 is connected with a gas cylinder 15 through a gas pipe 14, the inner side of the top of the upper box body is provided with a temperature and humidity sensor 16, a gas concentration sensor 11 and a spray head 12 (capable of spraying mist, water, acid, salt solution and the like), an ultraviolet lamp tube 19 is arranged in the upper box body, two layers of steel wire mesh discs 20 are arranged in the upper box body, a door cover 21 is arranged in front of the box body, the door cover 21 is provided with a handle 22, the left side and the right side of the lower part of the upper box body are provided with a water inlet/outlet 24, and the water inlet/outlet 24 is provided with a control valve; the lower box body is composed of an outer plate 1, heat dissipation holes 17 are formed in the outer plate 1, a compressor 27 and a high-pressure micro-mist humidifier 30 are arranged in the lower box body, rollers 28 are mounted at the bottom of the lower box body, a control box 29 is arranged at the front part of the lower box body, the heat dissipation box body 10 is located on the rear side of the whole test box body, and a refrigerating system is arranged in the heat dissipation box body 10; the spraying device comprises a high-pressure micro-mist humidifier 30, a water delivery pipe 31 and a spray head 12, wherein the high-pressure micro-mist humidifier 30 is connected with the water delivery pipe 31 and a third connecting pipe 33, the water delivery pipe 31 is connected with the spray head 12 of the upper box body, the third connecting pipe 33 leads to the outer side of the lower box body and is connected with a water tank 32, and the water tank 32 is provided with scales; the control box 29 in have visual controlling means, visual controlling means includes power control switch, visual humidity control panel, visual temperature control panel, visual atomizing control panel and visual gas concentration monitoring control panel and ultraviolet intensity control panel.
2. The asphalt concrete aging test device under the multi-factor coupling effect according to claim 1, characterized in that: the ultraviolet lamp tube 19 is made of corrosion-resistant and insulating materials, and the lamp wires are arranged between the plate layers.
3. The asphalt concrete aging test device under the multi-factor coupling effect according to claim 2, characterized in that: the pipeline connecting the high-pressure micro-mist humidifier 30 and the spray head 12 is arranged between the inner and outer laminates.
4. The asphalt concrete aging test device under the multi-factor coupling effect according to claim 3, characterized in that: the control box 29 is a visual touch screen display.
5. The asphalt concrete aging test device under the multi-factor coupling effect according to claim 4, characterized in that: the test chamber and water tank 32 are marked with graduations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210607713.9A CN114858693A (en) | 2022-05-31 | 2022-05-31 | Asphalt concrete aging test device under multi-factor coupling effect |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210607713.9A CN114858693A (en) | 2022-05-31 | 2022-05-31 | Asphalt concrete aging test device under multi-factor coupling effect |
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| CN114858693A true CN114858693A (en) | 2022-08-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115479884A (en) * | 2022-09-01 | 2022-12-16 | 哈尔滨工业大学 | Test and evaluation method considering influence of freeze thawing and aging on asphalt mixture performance |
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- 2022-05-31 CN CN202210607713.9A patent/CN114858693A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115479884A (en) * | 2022-09-01 | 2022-12-16 | 哈尔滨工业大学 | Test and evaluation method considering influence of freeze thawing and aging on asphalt mixture performance |
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